[PSUBS-MAILIST] SEMjr - DIY Electronic Project

[Alan James via Personal_Submersibles]

 Thanks Jon, that's a great result. An inexpensive way to monitor all the main environmental conditions! Alan
    On Tuesday, December 22, 2020, 10:50:28 AM GMT+13, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
  I have finished the SEMJR software and uploaded it to the web site along with instructions of how to load the software on the Teensy 4.0 microprocessor.  If you are familiar with the Arduino IDE you will find it a fairly simple and standard process.  If you are not familiar with the Arduino IDE or programming, you may find the procedure a bit daunting but stick with it and just follow the instructions step-by-step.  If you just can't get it and are unsuccessful, consider reaching out to someone who has been successful and ask them to load the software on your microprocessor for you.
You can also reach out to the mailing list, or Facebook page, and seek help getting the loader running from others that are familiar with the Arduino IDE, including myself.  We will need to know what operating system you are using (MAC, UNIX, Windows) and also what version of that operating system you have.
I still need to draft an Operating Manual for the project, although if you can get the software loaded it should all just work without any other configuration.
I have changed the menus so that O2, CO2, and Po (change in cabin pressure) appear on one menu; Barometer, Humidity, and Temperature appear on the second menu.  See website for new menu display.  By default, the menus cycle automatically with each being displayed for four seconds.  You can add a momentary button to the project to manually cycle through the menus, or keep one menu displayed on purpose.
Three alarms are built into the software.  If an alarm is set, the alarm menu displays the sensor that caused the alarm and holds on that menu until all alarms have fallen within acceptable limits.  In other words, if the alarm menu is displayed, no other menus are accessible until all alarms have been extinguished.  If you get an alarm, SURFACE and deal with it there.O2 alarms at 19.0 and 23.0 percent.CO2 alarms at 5000 ppmPo alarms at 2psi (137mbar) below or above whatever the pressure was when you started the dive
I'm working on a couple of videos to help envision all this stuff, but...you know how it goes.  Video editing is painfully slow, as is the PDF documentation.  sigh...geeeeesh.....
Jon

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